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Ten years ago, the city of Chicago introduced its Energy Conservation Code, based largely on the International Energy Conservation Code (IECC). The 2001 Chicago Energy Code was written to increase savings by lessening energy drain both commercially and residentially.

In that time, it has been revised twice: in 2006 and 2009. These revisions have seen some modest gains in efficiency. The 2009 edition, for example, contains a 15% increase in overall energy savings beyond the 2006 book.Read More…